The word unappealingly is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 28
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (37 words)
agilely, alanine, allying, anginal, guanine, gunplay, inanely, lanugal, lapping, leaning, leaping, lingual, napping, paenula, palling, papally, papilla, pealing, penguin, pillage, pinnule, pipelay, plainly, planing, playing, playpen, pulling, pulpily, pulping, unagile, unalign, yapping, yauping, yealing, yeaning, yelling, yelping